reserving intent and arg as global attributes

index.html

@@ -233,10 +233,11 @@ <h4>The Top-Level <code>&lt;math&gt;</code> Element</h4>
             The <code>&lt;math&gt;</code>
             element accepts the attributes described
             in <a href="#global-attributes"></a> as well as the
-            following attribute:
+            following attributes:
           </p>
           <ul>
             <li><a>display</a></li>
+            <li><a>alttext</a></li>
           </ul>
           <p>
             The
@@ -256,7 +257,16 @@ <h4>The Top-Level <code>&lt;math&gt;</code> Element</h4>
             If the <code>display</code>
             attribute is absent or has an invalid value, the User Agent
             stylesheet treats it the same as <code>inline</code>.
+          </p> 
+	  <p>
+           This specification does not define any observable behavior that is
+           specific to the <dfn><code>alttext</code></dfn> attribute.
           </p>
+          <div class="note">
+	  The <a><code>alttext</code></a> attribute may be used as
+	  alternative text by some legacy systems that do not
+	  implement math layout.</div>
+
           <p>
             If the element does not have its computed
             <a><code>display</code> property</a> equal to
@@ -367,6 +377,7 @@ <h4>Global Attributes</h4>
             <li><a><code>style</code></a></li>
             <li><a><code>tabindex</code></a></li>
             <li><a href="#event-handler-content-attributes"><code>on*</code> event handler attributes</a></li>
+            <li>additional attributes, as described in <a href="#other-valid-attributes"></a></li>
           </ul>
         </section>
         <section id="attributes-common-to-html-and-mathml-elements">
@@ -553,7 +564,7 @@ <h4>The <code>mathvariant</code> attribute</h4>
             <code>ssXY</code> properties from [[OPEN-FONT-FORMAT]]
             to provide both styles. Page authors may use the
             <a data-cite="CSS-FONTS-4#font-variant-alternates-prop"><code>font-variant-alternates</code></a> property with corresponding OpenType font features
-            to access these glyphs.
+            to access these glyphs.</p>
           </div>
         </section>
         <section id="the-displaystyle-and-scriptlevel-attributes">
@@ -632,7 +643,22 @@ <h4>The <code>displaystyle</code> and <code>scriptlevel</code> attributes</h4>
             and <code>false</code> and 2, respectively.
           </div>
         </section>
-      </section>
+        <section id="other-valid-attributes">
+          <h4>Attributes Reserved as Valid</h4>
+          <p>The attributes
+          <dfn><code>intent</code></dfn> and <dfn><code>arg</code></dfn>
+	  are reserved as valid attributes.</p>
+          <p>
+           This specification does not define any observable behavior that is
+           specific to the <a><code>intent</code></a> and <a><code>arg</code></a> attributes.
+          </p>
+          <div class="note">
+           These attributes are described in [[MATHML4]] and
+	   future versions of this specification may or may not
+           define them. Authors should be aware that they are currently
+           in development and subject to change.
+	  </div>
+	</section>
       <section>
         <h3>Integration in the Web Platform</h3>
         <section id="html-and-svg">
@@ -5627,9 +5653,8 @@ <h3>Operator Dictionary</h3>
 		  </li>
                 </ul>
               </li>
-            </ul>
-          </li>
-        </ol>
+            </ol>
+          </section>
         <div id="operator-dictionary-entries-compact"
              data-include="tables/operator-dictionary-compact.html"></div>
 
@@ -5653,7 +5678,8 @@ <h3>Operator Dictionary</h3>
               <a href="#operator-dictionary-categories-hexa-table"></a>
               rather than on each large subtable
               of <a href="#operator-dictionary-category-table"></a>.
-          </p>
+          </li>
+	  </ul>
         </div>
         <p id="stretchy-operator-axis">
           The <dfn>intrinsic stretch axis</dfn> a Unicode character
@@ -5927,7 +5953,7 @@ <h2>Security Considerations</h2>
 
         <p>This feature is not available in MathML Core, where
         the <a><code>&lt;maction&gt;</code></a> element essentially behaves
-        like an <a><code>&lt;mrow&gt;</code></a> container with extra style.
+        like an <a><code>&lt;mrow&gt;</code></a> container with extra style.</p>
       </div>
       <p>An attacker can try to hang the UA by inserting very large
         stretchy operators, effectively making the algorithm
@@ -6006,7 +6032,6 @@ <h2>Privacy Considerations</h2>
         the UI serif font provide Asian glyphs:</p>
         <pre data-include="examples/example-font-information-leakage-2.html"
              data-include-format="text"></pre>
-        <p>
       </div>
       <div class="example" id="font-information-leakage-3">
         <p>The following
@@ -6020,7 +6045,6 @@ <h2>Privacy Considerations</h2>
         </p>
         <pre data-include="examples/example-font-information-leakage-3.html"
              data-include-format="text"></pre>
-        <p>
       </div>
       <p>This specification relies on information from
         <a href="#opentype-math-table"></a> to render MathML content. One